I used the default color scheme on my color Palm (the Sony Clie
PEG-UX50/U).
Then I found that there is a "Nostalgy" theme: a green-Black one. It
resembles so much the first palms so it is hard tu use (it probably was
not meant to be useless but the original Palms had thick screen fonts
and there are very thin ones). So I played wit that for some time and
the selected the "Steel" theme. It seems to be the best one (at least
for me) as it fits well the rest of OS (the graffiti area and the
sidebar)..
